This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI32X150S, with the same bore, stroke, output force, port and mounting, so it fits the same application. The SAI replacement keeps the same ISO 15552 mounting interface, bore, stroke, output force and accessories, so it drops straight into existing fixtures. It is the current-production version of this cylinder with an upgraded piston seal.
Airtac SI32 Standard Air Cylinder SI32X150S
The AirTAC SI32 Standard Air Cylinder SI32X150S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø32mm bore and 150mm stroke, G1/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI32X150S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ32 mm
- Stroke150 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- StatusDiscontinued → SAI32X150S
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SI32 Standard Air Cylinder SI32X150S
The AirTAC SI32X150S is a discontinued double-acting ISO 15552 profile cylinder with a 32 mm bore and 150 mm stroke. Providing 402 N push force at 0.5 MPa, it features a G1/8 port and a built-in piston magnet for CS1-B/DS1-B switches. AirTAC replaced this legacy unit with the SAI32X150S, a direct upgrade retaining the exact ISO 15552 mounting interface, bore, stroke, output force, and porting.
The SAI replacement incorporates an upgraded piston seal utilizing two Y-shaped one-way elements for low start-up pressure and extended life. For applications requiring load holding, note that a standard cylinder drifts on air loss—the cushion only decelerates—so consider the SAIL or BSAI lock variants.
Airtac SI32 Standard Air Cylinder SI32X150S Technical Specifications
| Model | Airtac SI32 Standard Air Cylinder SI32X150S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI32X150S |
| Bore size | Ø32 mm |
| Stroke | 150 mm |
| Acting type | Double acting |
| Port size | G1/8 |
| Rod thread | M10×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 27 mm |
| Max standard stroke | Up to 1000 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI32X150S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø32mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 402 N | 346 N |
| 0.7 MPa | 563 N | — |
| Max (@1.0 MPa) | 82 kgf | |
The SAI32X150S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI32 Standard Air Cylinder SI32X150S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 32 | Bore size in mm. |
| ×150 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SI-family variants: SID (double rod), SIJ (adjustable stroke) — each maps to its SAI equivalent (SID→SAID, SIJ→SAIJ). Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B).
Where the Airtac SI32 Standard Air Cylinder SI32X150S Is Used
Small Part Ejection
Uses the 402 N push force at 0.5 MPa to reliably push lightweight molded plastic components out of a machining fixture.
Package Diverting
Actuates a routing gate on a 150 mm stroke to sort small boxes on a packaging line, fitting within standard ISO 15552 foot mounts.
Clamp Actuation
Drives a secondary clamping mechanism in an assembly cell where the 345 N pull force securely holds a workpiece.
Replacing the Airtac SI32 Standard Air Cylinder SI32X150S with the SAI32X150S
To replace the discontinued SI32X150S, order the SAI32X150S. Confirm the ISO 15552 mounting interface, 150 mm stroke, G1/8 port (PT/G/NPT thread options), and the -S magnet for legacy CS1-B/DS1-B sensors. Sizing both ways: the 32 mm bore yields 402 N push at 0.5 MPa, while the neighboring 40 mm bore offers 628 N. Because this 150 mm stroke is under 300 mm, side-load rod-bending risks are minimal, but always ensure proper guide alignment. Remember that a plain SAI does not hold load without live air; for vertical or safety-critical holding, select the SAIL (air-released lock) or BSAI (clamp-lock) variants, or use an external pilot check valve. The SAIF variant with a built-in 4M valve is also available for this 32 mm bore.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI32X150S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI32 Standard Air Cylinder SI32X150S FAQ
Yes, the SI32X150S is discontinued. The direct replacement is the AirTAC SAI32X150S. It shares the same ISO 15552 mounting interface, 32 mm bore, 150 mm stroke, G1/8 port, and output force, fitting existing fixtures perfectly while adding an upgraded piston seal.
This double-acting cylinder has a G1/8 air port and an M10x1.25 rod thread. Theoretical forces are 402 N push and 345 N pull at 0.5 MPa, 563 N push at 0.7 MPa, 724 N push at 0.9 MPa, and a maximum force of 82 kgf at 1.0 MPa. Operating speed ranges from 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI32X150S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI32X150S replacement — usually within 7-8 hours.